# -*- coding: utf-8 -*-
"""
Spyder Editor

This is a temporary script file.
"""
# 1
x = 10
y = 20
z = x + y
print(z)
#(2)
a = 3.14
b = 2.718
c = a * b
print(c)
#(3)
name ="randongwei"
first_char=name[0]
sub_str=name[1:4]
upper_name=name.upper()
print(first_char)
print(sub_str)
print(upper_name)
#(4)
numbers=[]
for  i  in  [1.10]:
  numbers=[1,2,3,4,5,6,7,8,9,10]
numbers[4]=100
numbers.remove(numbers[2])
print[numbers]
#(5)
coiors=["dog","tv","out",]
coiors=list[coiors]
coiors=(coiors)+(yellow
       